Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station
From March 9,1985 to January 11,1986,428 medium-scale traveling ionospheric disturbances (TID's) were detected at Syowa Station, Antarctica, by means of differential-Doppler measurements with the 150 and 400MHz beacon waves from six NNSS satellites. It is found from statistical analysis that (1...
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Radio Research Laboratory/Radio Research Laboratory/Radio Research Laboratory/Radio Research Laboratory
1988
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ftnipr:oai:nipr.repo.nii.ac.jp:00004048 2023-05-15T13:49:01+02:00 Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station Tadahiko Ogawa Kiyoshi Igarashi Kazuhiro Aikyou Hideo Maeno 1988-02 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4048 http://id.nii.ac.jp/1291/00004048/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4048&item_no=1&attribute_id=18&file_no=1 en eng Radio Research Laboratory/Radio Research Laboratory/Radio Research Laboratory/Radio Research Laboratory National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4048 http://id.nii.ac.jp/1291/00004048/ AA10756224 Proceedings of the NIPR Symposium on Upper Atmosphere Physics, 1, 192-198(1988-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4048&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1988 ftnipr 2023-01-14T19:56:31Z From March 9,1985 to January 11,1986,428 medium-scale traveling ionospheric disturbances (TID's) were detected at Syowa Station, Antarctica, by means of differential-Doppler measurements with the 150 and 400MHz beacon waves from six NNSS satellites. It is found from statistical analysis that (1) the medium-scale TID's in the polar regions appear quite often during geomagnetically quiet and moderately disturbed conditions and their occurrence seems not to increase with increasing geomagnetic activity, (2) they attain the maximum activity in winter and the minimum in summer, (3) diurnal variation shows the maximum occurrence around 1400-1600LT with a second maximum around midnight, and (4) most of the medium-scale TID's propagate from south toward the equator. These findings are compared with observations made at midlatitude to find a fairly good consistency between both results. It is pointed out that the gravity waves excited in the mesosphere rather than in the auroral ionosphere play an important role in producing most of the observed medium-scale TID's. Report Antarc* Antarctica National Institute of Polar Research Repository, Japan Syowa Station |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
From March 9,1985 to January 11,1986,428 medium-scale traveling ionospheric disturbances (TID's) were detected at Syowa Station, Antarctica, by means of differential-Doppler measurements with the 150 and 400MHz beacon waves from six NNSS satellites. It is found from statistical analysis that (1) the medium-scale TID's in the polar regions appear quite often during geomagnetically quiet and moderately disturbed conditions and their occurrence seems not to increase with increasing geomagnetic activity, (2) they attain the maximum activity in winter and the minimum in summer, (3) diurnal variation shows the maximum occurrence around 1400-1600LT with a second maximum around midnight, and (4) most of the medium-scale TID's propagate from south toward the equator. These findings are compared with observations made at midlatitude to find a fairly good consistency between both results. It is pointed out that the gravity waves excited in the mesosphere rather than in the auroral ionosphere play an important role in producing most of the observed medium-scale TID's. |
format |
Report |
author |
Tadahiko Ogawa Kiyoshi Igarashi Kazuhiro Aikyou Hideo Maeno |
spellingShingle |
Tadahiko Ogawa Kiyoshi Igarashi Kazuhiro Aikyou Hideo Maeno Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station |
author_facet |
Tadahiko Ogawa Kiyoshi Igarashi Kazuhiro Aikyou Hideo Maeno |
author_sort |
Tadahiko Ogawa |
title |
Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station |
title_short |
Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station |
title_full |
Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station |
title_fullStr |
Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station |
title_full_unstemmed |
Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station |
title_sort |
satellite observation of medium-scale traveling ionospheric disturbances over syowa station |
publisher |
Radio Research Laboratory/Radio Research Laboratory/Radio Research Laboratory/Radio Research Laboratory |
publishDate |
1988 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4048 http://id.nii.ac.jp/1291/00004048/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4048&item_no=1&attribute_id=18&file_no=1 |
geographic |
Syowa Station |
geographic_facet |
Syowa Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4048 http://id.nii.ac.jp/1291/00004048/ AA10756224 Proceedings of the NIPR Symposium on Upper Atmosphere Physics, 1, 192-198(1988-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4048&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250460897869824 |